Dry powder sprayer



1951 E. GUSTAFSSON ET AL 5 5 9 DRY POWDER SPRAYER Filed May 14, 1947 5Sheets-Sheet l [.Nvavrons Ee/c GusmFssa/v JOHN W 5402 A 71/500025 KERN5W5; 4M,

Arr-Y.

Dec. 4, 1951 E. GUSTAFSSON ETAL 2,577,519

DRY POWDER SPRAYER Filed May 14. 1947 5 Sheets-Sheet 3 M W I16 832 I I/09 U0 9 [NVENTORS Emc 6us-rAFsso/v JOHN. In! BAue 774500025 KERN g mmzam ATrY.

Dec. 4, 1951 GUSTAFSSON ETAL 2,577,519

DRY POWDER SPRAYER Filed May 14, 1947 5 Sheets-Sheet 4 [N vszvrozs ERICGusmrasow JOHN M 5402 71 1500025 KEEN fiYafiuaL WM,

Dec. 4, 1951 E. GUSTAFSSON EI'AL.

DRY POWDER SPRAYER Filed May 14, 1947 5 Sheets-Sheet 5 fA/vEA/Toes [21cGusrarssau Jan/v M 5.4 U2 77-IOD 0R KERN Arrv.

Patent ed Dec. 4, 1951 2,577,519 DRY POWDER SPRAYER Eric Gustafsson,John W. Baur, and Theodore Kern, Chicago, 111., assignors .to BinksMannfaoturing Company, Chicago, 111., a corporation of Delaware Thepresent invention relates to spraying devices and more particularly tomeans for spray,

ing powder or powder-like material or substanfifi.

Among the objects of the invention to pro vide a novel device or meansfor distributing a dry powder or powdery substance in the form of acloud or clouds, particularly for use upon; printed sheets in printingas they are moved toward stacking or like position to prevent oliset ofink, colors, and the like; comprising a chamber, container or holder,made of any suitable material, but preferably of transparent or likematerial, for holding the substance, with means for projecting a fluid,such as air, against or into such substance to nebulate or form ahomogeneous fiuidal and aerated mass ofv fine particles and air or thelike, and with means for conducting such mass with or without more airor the like tda locus of use or application or the like. I Anotherobject of the inventionis to provide such means with a novel means of'distribution of the nebulated and aerated mass or particles to efiect awide range of application over the printed sheets of different sizes andshapes, which means is preferably adjustable for such purposes.

A still further object of the invention is to provide a novel covermeans which carries as a unit the air passages, the air nozzles, thefiller means, and the control valves for the passage of air to thepowder chamber.

A further object of the invention is to provide novel means forefi'ecting the fluid impulses for the nebulating and aerating of thesubstance, directly and proximately to the mass of material to benebulated and aerated, as also to likewise efiect the delivery of thenebulated and aerated cloud or clouds of the particles to the locus ofapplication.

Another object of the invention is to provide novel means for moreevenly applying the fluid impulses to the mass to be nebulated andaerated.

A still further object is to provide a novel def vice with means forfacilitating the adding or replenishing of more material to the devicewith: out dismantling the device.

Another object of the invention is to provide a novel assembly of theparts. 1

Other objects, advantages, capabilities, tea tures, and the likearecomprehended by the in yention as will later appear, or asare'inherently possessed by the invention.

Referring briefly to the drawings: Fig. 1 is a view in elevation of anassembly emf bodying the invention;

Fig. 2 is a top planview of the same;

Fig. 3 is a vertical sectional view, on an e larged scale, of thedevice;

Fig. 4 is a horizontal sectional view taken, in a' plane represented byline 4-4 inFig. 301 the drawings;

Application May-14,- 1947, Serial No. 748,092

9 claims." (01. 91-45)} Fi 5 is airagm ntary sectional vi w taken in.

a. plan r presented by line 5- in i 3 f the drawings; Fi 6 a part eevati nal. d par se tiona vi w of an adjustable dis ri ut n po t on ofthe device;

Fig, 7 is a sectional view taken in a plane represented by line 'l-.-:l,in Fig. 6 of the drawings; F 8.1 v a agme ert al onal i w on enlargedscale, of a control feature shown. v .e.-i;,-... Y

Fig, 9 is asimilar view of another control feature shown in Fig. 3; Fig.10 is a part sectional view of the holder and air delivery,v mean floa nim he. materi in the holder; Figs. 1 1 ,12 and 13 are, plan views of;alternate, ,form o .tbefioat means, v 11 as c i nal view si i art t atshown E g- 4,. .Qnasma1le ale. of an ter a form Qtdevice;

1 is an elevationalviewof-an alternate form of adjustable distributingportion of thede vice, comparative to that. shown in Figs. 1 and 6; Fig.l6- is a top plan view of the distributive part of thedevice-shown inFig. 15;. Fig. 17 isa part sectional view taken in a plane representedby line 11-1! in Fig 16 of thedraw mas; a Fig. 18 is-aifragmentarysectional view of an air supply nozzle part alternative to that shown inFig. 3. v 1 Referring more in detail. to the drawings, the embodimentschosen to illustrate the invention comprises a, container, holder orchamber .51, which can be made of any suitable material, preferably oftransparent material, such as a synthetic or plastic material throughwhich the material and the parts-inside the holder or chamber 5! may beeasily seen. The chamber or container 5| comprise an upper chamberportion com.- rised n a p. ap o cover 2 i g a l p. flan or 1 1111.53 seF g. 3) for fittin wi h a sealing at to a. neck, flan e or rim po tion.54 of the lower or bowl like chamber portion 5.5 of the chamber holder5L As shown the bowl. portion 55 is tapered generally downwardly as.wellas ing 6.3, as by way of, a hub 64. The relative linear adjustmentof the telescopic tubes GI and 62 is 00 fixed by a suitable clampingmeans 65 (see Figs.

' 3 i and 2) The box or housing 83 is supported on and connected to theupper end of the hollow post 65, as by way of a hub Bl, the post beingsuitably associated with a printing press or the like (not shown).

Extending through the telescopic tube means 6I62 i a flexible airdelivery tube 88 which is coupled at an end thereof by way of a suitablecoupling means 69 which is in turn coupled to a coupling member 10 (seeFig. 3) secured, as threaded, to a threaded socket portion II of the cap52 (see Fig. 3), and with the other portion of the tube 68 extendingthrough the tube 6I62 to the box 53 in which the tube 68 is reeled on asuitable let-oil and take-up means (not shown) in the box 63, and thenceconnected, as by way of the post GIi, to a suitable air compressingmeans associated with the press, (not shown).

The coupling I has a passage 12 for delivery of compressed air to achamber I3 of the socket portion II, and this chamber I3 has a passageI4 leading to a passage 15 which in turn leads to a valve chamber 16,all formed with and provided in the cap 52 (see Figs. 3 and 8). In thevalve chamber I6 is a valve seat 'I'I surrounding a valve chamber outletpassage or chamber I8 and in the wall of the chamber I8 is an outletport I9 in communication with an air passage 80 (see Fig. 4) leading toa valve chamber 8|.

Referring to Fig. 14, in lieu of running an air passage 80 from thechamber I8 to the valve chamber 8|, a more direct and shorter passage80* is run from the chamber 18 to a central recess or chamber II (laterdescribed) and from this recess or chamber I I5 is run an air passageIIG', which serves the same purpose of supplying air or air impulses tothe chamber 8|, in lieu of by way of thpa'ssage 80 as shown in Fig. 4.

able packing means I04 held pressed by a s ring ing portion IIO of thevalve 99. As shown in Fig.

At the chamber 16 the cap 52 has a hub portion 82 having an annularvalve seat 83 on which is supported the border of a diaphragm type ofvalve 84. The hub 82 is threaded to receive a hollow nut 85 having anannular seating portion 86 (see Fig. 8) for pressing against a pressurering 81 which seats on the border portion of the diaphragm 84, thussealingly holding the parts in place.

The nut 85 i threaded to adjustably receive an adjusting nut 88 having ahead 89 for digital engagement when adjusting the nut 88. The nut 88 maybe held in adjusted relation by way of the 'locknut 90 threaded to thenut 88v and engageable with the top of the nut 85 (see Fig. 8). In thenut 88 is a chamber 9| in which is slideable the stem 92 of a valvefollower or valve pressure head 93, and the nut 88 also has a springchamber 94 in which is an end portion of the spring 95, the other endportion of this spring being pressed against the valve follower or head93, as shown in Fig. 8.

The cap 52 also has a. hub portion 96 in which the chamber 8| isprovided, and this hub 98 is threaded to receive a'valve control meanscomprising a'pl-ug 9'! threaded in the hub 96 (see Fig. 9). In this plug91 is threadedly engaged a threaded stem portion 98 of a valve 99. Atthe upper end of the stem 98 is connected a finger piece I00 held inoperative relation to the stem 98 by a set screw IOI or the like,whereby the open ing of the valve 99 may be adjusted by a digital.turning of the piece I00 and the consequent adjusting of the threadedpart of the stem 98 in the plug 91. The plug 91 has a recess or chamberI02 through which extends a reduced portion I03 of 3 the nozzle I08: isfixed to the connector I08 and is straight to direct air impulsesdownwardly against the powder H3 in the chamber 5| so as to stir up acloud of dust or powder and to cause it to be nebulated and aerated.With some kinds of dust the direct downward projection of the airimpulses from the nozzle I08- may cause the forming of a deep recess orvwell in the powder mass. Hence, it is desirable, in such cases, toprovide a nozzle such as I08 shown in Fig. 18. In this case the upperend portion I08 of the nozzle I08 turnably fits in a socketed part ofthe nozzle connector I08 so that the lower portion I08 'of the nozzleI08 is bent to take different angular positions as shown by way ofillustration, in full and dotted line positions in Fig. 18, so that theair impulses may be directed toward different portions of the surface ofthe powder H3 in the chamber 5| as also with a more or less horizontalcomponent of direction-of thrust of the air impulses, whereby there is abetter stirring up and a more widely distribution of the disturbedpowder or powder particles, and also an avoidance or the formation of ahole or pit or pocket in the powdermass. a

The cap or cover 52 also has a filler hub or the V her or holder'5l withmore powder" I I3' 9. simple removing of the cap H2 is all thatisnecessary for the pouring in or adding of some more powder, after whichthe cap II2 may be closed.

At the central portion of the cap 52 is provided a threaded hub II4having a recess'or chamber II5 communicating by way of a passage 6'leading to the valve chamber 8|, and in the case of the form shown inFig. 14, also communication with the passage 80 leading to the valvechamber I8. In the hub I is connected the shank portion III of an airnozzle II8, the shank II'I having a nut portion II9 for screwing theshank III home (see Fig. 3 The shank portion III also has a portion I Hto which is threadedly engaged the upper or inner end of a mixingchamber I20, the latter extending down or away and having a hub portionI2| fitting closely in a hub portion I22 at the lower end orremote'portion oi the holder 5 I. See Fig. 3. The part I2 I has a nut orlike part I23 adapted to turn the parts I20 and I2I and also abut thehub I22. The lower or outer portion I24 of the hub I2I' is threaded toreceive a coupling member I25 for the holding on of a spray nozzle head,tip or the.like |26 which may have any suitable spray orifices or thelike I21.

At the upper or inner end portion of the mixing chamber I20 is providedone or more orifices I28 through which air and powder particles may beentrained and pass into the annular chamber I29. The lower or outer endof the air nozzle H8 is quite remote from the orifices I28, and isprovided with an outlet or orifice I30 so as to project therethrough ajet of air so as to act with an aspirating effect on the mixture of airand powder. p s in down or along the chamber I29 the stem 98, and inthis recess I02 is locatedsuitto the nozzle I26.

When assembling, the bowl part or chamber '55 and the cover 52 arelocated with the flanges 53 and 54 together and the assembly I20-I2I-I23is inserted through the hub I22 for the threaded upper or inner end ofthe chamber I20 to engage with the threaded part I Il of the shank I I1,and by turning the same by way of the nut I23 the parts are screwed homeand the flanged parts 53 and 54 are held in sealed condition.

In operation, air under pressure is supplied by way of the air deliverytube 68 to the valve chamber I6. When the pressure rises to the pointsufficient to overcome the force of the spring 95, the. valve diaphragm84 will raise suddenly from its seat 11 and permit a charge of air underpressure to pass, as an impulse, through the passages 18 and 80 to thechamber 8|, or through the passages I8 and BI] to the chamber '5, andalso by way of the passage II6 to the chamber 8|, and, in the case ofFigs. 3 and 4, thence by way of the passages I I6, I I5 and H3, and inthe case of Fig. 14, thence by way of the passages H5 and II8t0 beejected by way of the orifice I30 to aspirate air and powder in thechamber I29 and to project the resultant mass by way of the nozzleI26-I2'I; and at the same time some of the air charge will pass throughthe valve I09I I and nozzle I08 or I08 to. project puffs or charges ,of,compressed air against the powder 3 to cause the same to be stirred upand form a cloud or clouds of the dust orparticles and the air, whichwill; pass through the orifice or orifices I28 into the chamber I29 andbe drawn by and with the air jet projected from the orifice I30. Thepressure of the air charges is regulated by adjusting the pressure onthe spring 95, and the density or intensity of the powder content in themixture of air and powder in the chamber55 of the holder I and in thechamber I29 is regulated by adjusting the valve I09--I I0. Any desiredresult may be obtained by simply those two adjustments.

In use, a single spray nozzle I26, as shown in Fig. 3, may be sufiicientwhenspraying a small printed sheet, but when larger sheets are beinprinted the nozzle arrangement as shown by way of illustration in Figs.1, 2, 6, l5 and 16 may be used. Such arrangement is shown as comprisinga header I3I or I3I adapted to be coupled to the nozzle hub I24 by wayof the coupling member I25 or the header I3I. Connected to this headerI3I or I3 I are two or more ducts I32 or HP, as desired. The ducts I32have nozzle heads I33 of suitable form and provided with threadedportions I34 which correspond to the part I24 of the showing made inFig. 3. Hence, if the spread of the arms I32 is suflicient for sprayingon the sheets of a size being printed, it is then only necessary toattach the nozzle tips I26 and the couplings I25, by abutting the nozzletips I26 to the ends of the parts I34, and screwing home the couplingsI25 on the threaded parts I34.

In the case of Figs. 15 and 16, the ducts-I32, which are curved foraffording a minimum resistance of passage of the impulsed mixture of airand material, are connected to ducts I36, also likewise curved for likereasons, by way of swivel type of coupling means I60, and the outer endsof the ducts I36 have connected thereto spray nozzles or nozzle heads I6I.

Referring to Figs. 1, 2 and 6, for use with large or larger printedsheets, adjustable tube arms I36 may be connected to the parts I33--I34, such as arms I36 comprising tapered or telescopic connector partsI31 adapted to fit into corresponding parts I38 of the parts I33, sothat the part I31 may rotate in the part I38 and still be in sealingcontact. The parts I3'I are connected to an end of the tubes I36 andcarry union or coupling members. I39 threaded to engage the parts I34and also to compress springs I40 carried in them and between the partI31 and a flange part I of the part I39. See Fig. 6. The free ends ofthe tubes I36 carry nozzle parts I42 threaded to receive the couplingsI25 for holding the nozzle parts I26 in abutment thereto, as in the caseshown in Fig. 3'. Hence, the arms I36 may be angularly adjusted to coverany area of printed sheets :desired. The arm parts I32 may also beangularlyadjusted in the header I3I.

Referring to Figs 15, 16 and 17, the arms I32 and I36 are swivellyjointed or joined by way of the coupling means I60. This means comprisesa threaded part I62 in which fits an end portion I32 of the duct armI32, and thread to the part I62 is a connector I63 in which extends anend portion I36 of the duct arm I36 and which portion I36! turnsorswivels when adjustns thesposition oiithe arms I32 and I35. In themember I63 s. provided suitable packing or sealing means I64 and aspring I65 for holdin the-packing or sealing means I64 in sealingconditio h arm 3 y a so. if desired, turn onnectio .31".

spray nozzles I 6I at the outer ends of the arms I36 be oi similarstructure to that shown 6, and wherein the nozzle I6I may be connectedto an end part I42 fixed to the end of thearm-I36, and suitably threadedto receive e l nsri 25- Referringto Figs. 10, 11, 12 and 13, on thepowder H3 in the chamber 55 are shown a sort of float means I43, I44,I45, in the general form of hollow ringsor the like, each having aninlet tube or neck I46 to which is connected a flexible tube I41 (seeFig. 10) the other end of the tube I41 being connected to the deliveryend of the air nozzle I08 or, I08 (see Figs. 3 and 18).

Referring to Figs. 10 and 11, the float I43 is shown of annular form sothat it can spacedly surround the member I20 and rest upon the powderH3, and it has a chamber I48 in which the air charges from the nozzleI08 or I08 and tube I41 are. supplied. At'the upper portions of theouter and inner walls I49 and I50 of the member I43 are provided aplurality of downwardly directed and outwardly inclined air jet nozzlesor noses I5I and I52 through which air .may be impelled to be-projectedagainst the powder H3, at distributive points, to evenly stir up thepowder was to nebulate it and aerate it with the air, and also to effectreaction forces so as to maintain the member I43 at the surface of thepowder mass, as in a floating condition, so as to counteract thetendency of submerging the member I43, especially when fresh powder isadded tothe chamber 55 by way of the filler hub III from time'to time.The members I 43, I44 and I45'are preferably made or composed oflightweight material, such as a synthetic, plastic or likemateriaLandalso may be transparent if desired.

The-form shown in Fig. 12 is of a more or less tortuous form and havingouter and inner air jet nozzlesor noses I53 and I54 corresponding to thenoses-I5I and I52 shown in Fig. 10.

The form shown in Fig. 13 is of generally annular form and also hasinwardly extending chamber portions or lobes I55, as shown in Fig. 13,and these lobes have at the sides thereof and near the top thereof airjet nozzles or noses I56 7 corresponding to the noses I52 and I54 shownin Figs. 10, 11 and 12. The chamber I45 also has outer noses I51corresponding to outer noses I 5! and (53 shown in Figs. 10, 11 and 12.

While we have herein described and upon the drawings shown illustrativeembodiments of our invention, it is to be understood that the inventionis not limited thereto but comprehends other constructions, details,arrangements of parts, features, and the like without departing from thespirit of the invention.

Having thus disclosed the invention, we claim:

1. In a device for spraying a dry powder material, comprising a holderhaving a hollow body portion providing a chamber portion for normally.holding the dry powder material and a cover portion also having ahollow portion providing a chamber portion above the said chamberportion in said hollow body portion, both said body portion and saidcover portion having mutually engageable closing parts for uniting saidchamber portions, a connecting means connected at its lower end to thelower portion of said first mentioned chamber portion of said bodyportion and extending upwardly in both said chamber portions andconnected at its upper end to said cover portion for holding said bodyportion and said cover portion in mutually closed condition, said coverportion having an air passage provided with an air inlet and an airoutlet means extending in said chamber portions provided between saidbody portion and said cover portion, said connecting means having apassage provided with an inlet means at its upper end portion forcommunicating with said air passage provided in said 3 cover portion,and said connecting means having an outlet means at its lower endportion, said connecting means having a passage at an upper portionthereof for powdered material and air to pass from the upper portion ofsaid chamber portions into said passage in said connecting means, and aspray means connected to said lower end portion of said connecting meansand communicating with said passage in said connecting means andextending outside of the chamber portion of said body portion.

2. A device as set forth in claim 1, and wherein said air passage insaid cover portion has a nozzle extending into said chamber portions andabove said powder therein for projecting air against said powder in saidfirst chamber portion and to stir up and mix with some of said powderfor said mixture to pass into the passage provided at the upper portionof said connecting means.

3. A device as set forth in claim 2, and wherein said air passage insaid cover has a valve means for controlling and regulating the passageof air from said air passage in said cover portion and to said nozzleextending into said chamber portions.

4. A device as set forth in claim 3, and wherein is provided anair-pressure control valve in said air inlet of said air passageprovided in said I cover portion.

' chamber portion, said body portion and said eating with said passagein said connecting means, said cover portion having an air passagetherein with said air passage provided with an air discharge meanslocated in the upper portion of said chamber for supplying air to thepowdery material located in said first mentioned chamber portion forproducing a cloud of powdery material in said chamber portionsto flow tosaid openings in the upper portion of said connecting means and to saidpassage in said connecting means.

6. A device as set forth in claim 5, and wherein said passage in saidcover portion has a passage portion extending to and connected to thepassage in said connecting means at said upper portion thereof. I

7 -A device as set forth in claimfi, and wherein said cover portionhasan airdischarge means located in the upper portion of said chamberfor supplying air to saidpowdery material, and comprises an airdistributing means floating on the powdery material in said holder, andan air .duct connected to said floating means and to said air dischargemeans.

8. A device as set forth in claim 7, and wherein said floating airdistributing means has downwardly directed air distributing nozzles forprojecting jet of air against said powdery material in said holder.

9. A device as set forth in claim 7, and wherein said floating airdistributing meansis of extended form for extending over said powderymaterial in said holder and' around said connecting means.

ERIC GUSTAFSSON. JOHN W. BAUR. THEODORE KERN.

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